THE PROSPERO GENE SPECIFIES CELL FATES IN THE DROSOPHILA CENTRAL-NERVOUS-SYSTEM

THE PROSPERO GENE SPECIFIES CELL FATES IN THE DROSOPHILA CENTRAL-NERVOUS-SYSTEM
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DOI:
10.1016/0092-8674(91)90463-9
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发表时间:
1991-05-03
期刊:
影响因子:
64.5
通讯作者:
SCOTT, MP
SCOTT, MP
中科院分区:
生物学1区
文献类型:
--
作者:
DOE, CQ;CHULAGRAFF, Q;SCOTT, MP

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用于产生神经元多样性的分子机制在很大程度上是未知的。 为了鉴定果蝇中枢神经系统中控制细胞命运的基因,我们筛选了改变发育中中枢神经系统中同源框基因表达的突变(表明细胞命运的变化)。 我们还筛选了“增强子陷阱”系,以鉴定在神经干细胞(成神经细胞)中表达的基因。 在这两个筛选中均发现了HSP70基因。 Prospero在成神经细胞、感觉神经元前体和经鉴定的神经胶质前体的子集中表达。 它不在神经元中表达。 缺乏轴突导向功能的神经母细胞产生异常的细胞谱系,产生不正确的特定后代,这些后代分化成显示轴突寻路缺陷的神经元。 因此,Prospero是一种在成神经细胞中表达的新型基因,已知其指定神经元的命运。
The molecular mechanisms used to generate neuronal diversity are largely unknown. To identify genes controlling cell fate in the Drosophila central nervous system, we screened for mutations that alter expression of homeobox genes in the developing central nervous system (indicating changes in cell fates). We also screened "enhancer trap" lines to identify genes expressed in neuronal stem cells (neuroblasts). The prospero gene was discovered in both screens. Prospero is expressed in a subset of neuroblasts, sensory neuron precursors, and identified glial precursors. It is not expressed in neurons. Neuroblasts lacking prospero function generate abnormal cell lineages, producing incorrectly specified progeny that differentiate into neurons showing axon pathfinding defects. Prospero is therefore a novel type of gene expressed in neuroblasts and known to specify neuronal fate.